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ryanrsrsrs
ryanrsrsrs
Associate II
February 15, 2005
Question

GPIO speed

  • February 15, 2005
  • 2 replies
  • 913 views
Posted on February 15, 2005 at 15:36

GPIO speed

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2 replies

ryanrsrsrs
ryanrsrsrsAuthor
Associate II
February 15, 2005
Posted on February 15, 2005 at 01:44

I know the Philips LPC2106 has very slow GPIO. Is the STR711 faster? My application may need to use bit-bang i/o.

If MCLK, PCLK1, PCLK2 all are 48MHz, what will be the execution speed of a string of STR instructions writing to GPIO?

What if MCLK is 48MHz and PCLK1,PCLK2 are both 12MHz?

Will it be faster if the code is executed from sram instead of flash?

ryanrsrsrs
ryanrsrsrsAuthor
Associate II
February 15, 2005
Posted on February 15, 2005 at 15:36

Thanks for the quick reply. The Philips chip took something ridiculous like 10 cycles!

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